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CAT523_04 Datasheet(Folha de dados) 1 Page - Catalyst Semiconductor

Nome de Peças. CAT523_04
descrição  Configured Digitally Programmable Potentiometer
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Fbricantes  CATALYST [Catalyst Semiconductor]
Página de início  http://www.catalyst-semiconductor.com
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© 2004 by Catalyst Semiconductor, Inc.
Characteristics subject to change without notice
FEATURES
s Two 8-bit DPPs configured as programmable
voltage sources in DAC-like applications
s Common reference inputs
s Non-volatile NVRAM memory wiper storage
s Output voltage range includes both supply rails
s 2 independently addressable buffered
output wipers
s 1 LSB accuracy, high resolution
s Serial microwire-like interface
s Single supply operation: 2.7V - 5.5V
s Setting read-back without effecting outputs
APPLICATIONS
s Automated product calibration.
s Remote control adjustment of equipment
s Offset, gain and zero adjustments in self-
calibrating and adaptive control systems.
s Tamper-proof calibrations.
s DAC (with memory) substitute
DESCRIPTION
The CAT523 is a dual, 8-bit digitally-programmable
potentiometer (DPP™) configured for programmable
voltage and DAC-like applications. Intended for final
calibration of products such as camcorders, fax
machines and cellular telephones on automated high
volume production lines, it is also well suited for systems
capable of self calibration, and applications where
equipment which is either difficult to access or in a
hazardous environment, requires periodic adjustment.
The two independently programmable DPPs have a
common output voltage range which
includes both
supply rails. The wipers are buffered by rail to rail op
amps. Wiper settings, stored in non-volatile NVRAM
memory, are not lost when the device is powered down
and are automatically reinstated when power is
returned. Each wiper can be dithered to test new output
values without effecting the stored settings and stored
settings can be read back without disturbing the
DPP’s output.
Control of the CAT523 is accomplished with a simple 3-
wire, Microwire-like serial interface. A Chip Select pin
allows several CAT523's to share a common serial
interface and communication back to the host controller
is via a single serial data line thanks to the CAT523’s Tri-
Stated Data Output pin. A RDY/
BSY output working in
concert with an internal low voltage detector signals
proper operation of non-volatile NVRAM memory Erase/
Write cycle.
The CAT523 is available in the 0
°C to 70°C Commercial
and -40
°C to + 85°C Industrial operating temperature
ranges and offered in 14-pin plastic DIP and SOIC
mount packages.
FUNCTIONAL DIAGRAM
PIN CONFIGURATION
CAT523
Configured Digitally Programmable Potentiometer (DPP™):
Programmable Voltage Applications
DIP Package (P, L)
SOIC Package (J, W)
CAT523
Doc. No. 2005, Rev. E
RDY/
BSY
CLK
CS
PROG
DI
DO
VDD
2
3
4
13
12
11
5
6
7
10
9
8
114
GND
VREFH
VOUT1
VOUT2
VREFL
CLK
CS
PROG
DI
DO
VDD
2
3
4
13
12
11
5
6
7
10
9
8
114
GND
VREFH
VOUT1
VOUT2
VREFL
CAT
523
CAT
523
RDY/
BSY
NC
NC
NC
NC
ALO
GEN FR
TM
LEAD FREE
RDY/BSY
PROG
PROGRAM
CONTROL
DI
CS
CLK
SERIAL
CONTROL
SERIAL
DATA
OUTPUT
REGISTER
GND
V
DD
14
7
5
2
4
V
13
12
OUT2
OUT1
V
6
DO
8
9
31
+
+
V
REFH
V
REFL
WIPER
CONTROL
REGISTER
AND
NVRAM




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